Flaring expander



Aug. 14, 1928. G. R. MAUPIN FLARING EXPANDER' Filed March 25, 1927 2sheetssheet 2 Patented Aug. 14,` 1928. i

.y UNITED STATES PATENT oFFIcE'.- GRAVES La. MAUPIN,1 or MoBERLi,ivrissouiar,` AssIGNoR To' THE J. FAiissLiiR Maun- FAc'rUmNe coiuANY, orMOBERLY, MISSOURI,JilcoPAitTNiiRsHir coMPosED or JOHN wranssLER,CHRISTINIA FAESSLER, LouisA ii. rAEssLER, AND GRAVES R. MAUPIN.

FLARING EXrANDER.

`Application filled` March 25, 1927.` Serial No. 178,330.

My invention relates to improvements in flaringexpanders, and has 'forits .primary object a` flaring expander which is vto be usedV inconnection with junction` boxes, headers or return bends in oil stills,and also for Haring tubes in steam boilers.

A further object is to construct a flaring eX ander which is providedwith Van ad]ust ab e gauge, which gauge is so secured as to limit theposition of the expander or rather the expander head without interferingwith 4the amount of expansion accomplished thereby. t

A still further Objectis to construct a flaringexpander, that is anexpanding tool `which is used forflaring-the ends of tubes in oil stillsso thatv `they `can be readily flared when the flaring end of vthe tubeis required, or `'in other cases the ends can be ared preparatory tobeading.

There are various types of june-tion boxes, headers or return bendsemployed; certain of whichuse a `tapered cap. Others which use a screwthreaded plug, either a straight plug or lwhat is commercially termed apipe thread` However with my device any ofv L these openings, which aredesigned tohave either screw threaded plugs `or tapered plugs inserted,will receive the thrust collar, the

thrust collar being arranged to lit thevarious openings.

In the drawings: i p a Fig. 1 is a. sectional view of a poition ofareturn bend in which a tapered plug is to `be inserted.' l M Fig. 2 isan enlarged fragmental section of m device showingthe thrust collar indetai. v` y Fig. 3 is an end view of the thrust collar with parts brokenaway `and in section showing the manner of pivoting the securing arms. i

Fig. 4' is an enlarged viewof the front end of the mandrel employed.

Fim 5 is a longitudinal sect-ion `takeneon the ine .fk-5 of Fig. 4.

Fig.v 6 is afragmental-sectioniof my device' illustrating 4the sainewhena screw threaded. hand hole is employed.

Fig. 7 is :1 -diagrammatic view illustratinga tube which has been rolledin before flaring.` f f A Fig. 8 Vis a similar view showing the tubeflared. f A

Fig. 9 is a diagrammatic view showing the tuberolled in where the endisto be beaded;

and

Fig. 10 is a similar view showing the tube as flared before being beadedover. y `ln the construction of my device 12-'re`presents either .ajunction box or return bendV Y whichis provided with ears 13. These earsi 13 are provided with slots`14. The forward end of the junction box orreturn bend is provided with a vcylindrical bore 15 through which a tube1G passes. The rear portion of the bore 15 is providedwith a taperedbore 17. vSpaced apart and vrearward from the bores 15'and 17 is' atapered bore or hand hole-` 18. This tapered bore is 'designedv tolreceive a cup-shaped member,-` which cup-N shaped member is held inposition by means ,of wedges and screws, as iswell knownV in the artand, therefore, will not bedescrib'ed in detail.

My improvement consists of a mandrelI 19'whic1i is provided onV itsforward end with a rectangular projection 20.V Ths pro Y jet-tion` hasVal bore 21 extending therethrough.' Carried by -tlie rectangular portion of the mandrel/19 is af tapered tip 22 which is provided with arectangular recess 23. The tip 22 is provided with a bore 24 v which isof the same diameter as the bore openings through which rollers 30project.Y

The openings in the cage are preferably made at an angle as fullyldescribed bynie in a patent issued to me December19," 1922beariiigPatent No. 1,439,568.

The rear end of the sleeveV 28 is screw threaded as indicated by thenumerall and kni'i'rled sleeve 32 which has arecess former in its rear'end. This recess is designed `10o on this screw threaded sleeveismounted ay towengage withr a dog lllwhich' isslidably l mounted in acollar 35. The collar has a T slot 36 formed therein so that the pin orhandle 'l'zcan permit the dog to `move forward and backward. The dog vismoved Y forward by means of the spring 38.

The collar 35 is secured to the mandrel by meansjof the` pin 39.4'Iheniandrel is further providedy at its rear end with bores 40 and 41for theinsertion of a lever to rol tate the mandrel and also with awrench engaging surface 42. This wrench engaging surface 42 mayalso'beutilized torthe purpose of attaching the device to a chuck.

Slidably ymounted on the sleeve 31 1is' a; sleeve 43, the forward endof'which is provided with a ,bearing ball thrust 44 and mounted on thesleevedis a thrustcollar 45. Thisthrust collar is provided witlratapered forward projectionwhen usedl as illustrated in thejunctionbox-of Fig. 1` with the taperedportionl,which snugly tits the i ta er18.

lill

ounted on` the sleeve 2.8 are nuts 47 and 48 by mea-ns of which thethrust collar can .bemoved forwardY andv backward thus permitting`adjustment 4ot the collar4 on the screwthreaded portion of the sleeveso that the; same can be adjusted to and. from the cage 29.v They thrustcollar is provided on its |reartace with diametrically opposite recesses49 in whiohthe .securing arms 50 are pivotally mounted.` The thrustcollaris also provided with recesses 51 which are formed inthe peripheryso as to permlt the insery'tion ot' thepivots or 3ins52. vThese recessesare clearly illustrate in Figs. 1 and 3.A The ,arms are Y normally'forced.,outward by means of springs 53 and are limited 1n their outwardmovement by projections'or dogsy threaded so lasto lit the screwthreadedbore used in certain constructions of o il stills. This bieremay be either the tapered plug typebr the cylindrical type. They thrustco laris provided with-a fiange 58 which has bores 59 'therein so thateither a spanner wrench or a bar may beused in order to secure the samein position. i Y

"'Ilhe-.balanceof the device is exactly the vsame as has beenpreviouslydescribed, that is especially relating. to the vadjustment of thecagefand the `feeding` mechanism.V

Figi I have illustrated [diagrammaticallytirst positionof Va tube whenrolled in aA header, a return bend or a junction box grid@ which Athetube is tof .be j only flared.

rollers 30 can be varied so that the angle of flarecanwbe made to suitvarious requirements.-` Therefore I do not dosircpto limit myself in anyway to the exact angle shown as to the taper ot the rollersor. tip.

ltaper of the tip 22 and the taper of the It will also be noted fromFig. 2 that the sleeve 32 isprovided at its reanend with an inwardlyprojecting flange G0 which .engages witha flange 61 formed integral withthe mandrel 19. 'lhe purpose ot the flanges 60 and 61.7willl beexplained indetail during the descriptionot the operation of my dcvice,as will be the lm urling of the sleeve32.

The operation of my device is as follows:

It will be noted fromthe drawings that t-he thrust collar illustrated inFigs. 1,2 and y is slidably mounted on the screw threaded sleeve 2S, itspositionv being fixed against forward and backward movement by means ofthe adjusting nuts 47 and48. n*Then in applying the device the nuty47is, screwed torwardfon the screw threaded portion of the slceveand thenut 48 screwed rearwardf ly so that the thrust collantogether, with thethrust bearingwill' have :tree longitudinal movementthereon. Whenthe-device has beenthus arrairged, the expander' is inserted through therear opening or hand hole so that the cage together with the rollerswill enter the tube to be flared.A lVhen this position has beenascertainedth c nut 48 is tightened or moved forward on the sleeve 28`so that there will be no further back movement of thethrust collar. Thenut 47 is then tightened toy position the thrust col lar against forwardmovement. preliminary;setting, it being understood, of course, that-noexpansion or flaring ot the end ofthe tube 16 has taken place. lhefnuts47 and 48 arethen tightened securely so thatL This is the ..1

no 4laterali shitting ot the thrust collar 'can i take place. The-deviceisqthen pushed linto position and in the case of the implementillustrated in Figs.` 1 and 2 the kseciuing arms 50 will bc snappedupward by reason ot the springs so that the shoulders 55 will engagewith the rear ends ofthe slots 14 and prevent any rearward movement.Then in this positionthe mandrel is pushed forward by rotating Vthesleeve 32 until the rollers areexpanded'soesto bear against the tube.Then the dog. 34 is released by swingingthe pin or handle into such aposition that-the dog can move forward and engage with the recess 33. Y

Further rotation of the mandrel rotates the sleeve, and by reason of theflanges 60 and 61 contacting and thescrew threads 3l, the sleeve 32 is`fed forward on the sieri/e 28 carrying-the mandrel forward and causingthe ti 22 to force the rollers 30 outward. Al backward movement of thedevice as illustrated in Fig. lis prevented by the securing arms 50, andin the instance of the device illustrated in Fig. 6 bythe screw threadedthrust collar 57.

After a suliicient amount of resistance ha been met, the dog 34 iswithdrawn and the mandrel revolved either by means of a bar, a wrench,or the chuck of some power machine until this resistance has beenpractically overcome when the mandrel is again fed forward in the mannerpreviously described. This is continued until the desired flare has beenobtained after which the entire expander can be readily removed.

It is also to be noted that during the forward feeding of the mandrelthe sleeve 32 is practically the sole feeding agency and its limit ofmovement can be regulated by any well known means, especially rby meansof an adjustable collar which has been disclosed in my Patent No.1,439,568 before mentioned, andwhich limitation of feeding does not formany part of my present inn vention.

In the disclosure illustrated in, Fig. 6`

the nuts 47 and 48 are loosened and the thrust collar 57 secured inposition by screwing it into the screw threaded opening and after themandrel and the operating parts have been pushedforward so that therollers willV engage with ,theV tube, the nut 48 is drawn up fairlyclose. Then the entire device is removed and the nut 47 tightened upafter which the screw threaded collar 57 is again placed in position byscrewing it into the screw threaded opening. Then the normal operationof the device takes place. It is essential that the thrust collar beheld against rearward movement andv also against all turning because itis this collar that takes up all the longitudinal pressure exerted bythe tool so that when the flaring occurs, thereA will be no rearwardmovement whatsoever of the thrust collar, and the cage togather with therollers will be held in fixed position.` Furthermore by mounting `thethrust collar on a sleeve with a thrust bearing there will be no rotarymovement imparted to the collar so that all thrust for movement thatthis collar will have to contend with will be a tendency to move itbackward longitudinally of the axisof the mandrel. In fact one of theessential features of my device is to equip a flaring expander with athrust collar which is longitudinally adjustable so that-tubes or ratherthe ends lhereof can be easily flared either to seat them in fla-ringbores or to flare them preparatory to beading the ends of the tubes.Therefore, my device is not limited to the structures disclosed in Figs.l and 6 but can also be used for the purposesdisclosed in the views 9and l0 intwhich the ultimate result obtained will be the beading of thetube.

Having fully described my invention, what I claim is I. A flaringexpander comprising a sleeve and having a cage on one end thereof,flaring rollers carried by said cage and adapted to 'be projectedradially therethrough, a man-V drel located in said sleeve and adaptedat its rear end to receive a rotating means so that said mandrel can berotated, a tapered tip detachably carried by the forward end of saidmandrel, said tip contacting with said rollers, means carried by 4saidsleeve for ried by said mandrel and adapted to operatively engage withsaid feeding means whereby said feeding means is operated when themandrel is rotated, a thrust collar adjustably and rotatably mounted onsaid sleeve, said` thrust collar adapted to prevent said cage frommoving' longitudinally when the device is in operation, and means forremovably securing said thrust collar in a hand hole.

2. A flaring expander comprising a sleeve,

feeding said mandrel forward, means car-V Y said Y longitudinal movementin the end of a lube..

while the same is being flared, and spring actuated means carried bysaid thrust collar for holding the same in position and GRAVES n MaUriN.

